ไกรพรม เ., and จันทรัตน์ ส. “Effects of By-Products from Oil Palm in Total Mixed Ration (TMR) in Goat Feed for Nutrient Utilization, Volatile Fatty Acid and Blood Metabolize”. Princess of Naradhiwas University Journal, vol. 10, no. 2, May 2018, pp. 171-83, https://li01.tci-thaijo.org/index.php/pnujr/article/view/122755.